; RUN: llc -mtriple=x86_64-apple-darwin %s -o %t -filetype=obj
; RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck %s

; Check that the friend tag is there and is followed by a DW_AT_friend that has a reference back.

; CHECK: [[BACK:0x[0-9a-f]*]]:   DW_TAG_class_type
; CHECK-NEXT: DW_AT_name [DW_FORM_strp]       ( .debug_str[{{.*}}] = "A")
; CHECK: DW_TAG_friend
; CHECK-NEXT: DW_AT_friend [DW_FORM_ref4]   (cu + 0x{{[0-9a-f]*}} => {[[BACK]]})


%class.A = type { i32 }
%class.B = type { i32 }

@a = global %class.A zeroinitializer, align 4
@b = global %class.B zeroinitializer, align 4

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!29}

!0 = metadata !{metadata !"0x11\004\00clang version 3.1 (trunk 153413) (llvm/trunk 153428)\000\00\000\00\000", metadata !28, metadata !1, metadata !1, metadata !1, metadata !3,  metadata !1} ; [ DW_TAG_compile_unit ]
!1 = metadata !{}
!3 = metadata !{metadata !5, metadata !17}
!5 = metadata !{metadata !"0x34\00a\00a\00\0010\000\001", null, metadata !6, metadata !7, %class.A* @a, null} ; [ DW_TAG_variable ]
!6 = metadata !{metadata !"0x29", metadata !28} ; [ DW_TAG_file_type ]
!7 = metadata !{metadata !"0x2\00A\001\0032\0032\000\000\000", metadata !28, null, null, metadata !8, null, null, null} ; [ DW_TAG_class_type ] [A] [line 1, size 32, align 32, offset 0] [def] [from ]
!8 = metadata !{metadata !9, metadata !11}
!9 = metadata !{metadata !"0xd\00a\002\0032\0032\000\001", metadata !28, metadata !7, metadata !10} ; [ DW_TAG_member ]
!10 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ]
!11 = metadata !{metadata !"0x2e\00A\00A\00\001\000\000\000\006\00320\000\001", metadata !6, metadata !7, metadata !12, null, null, null, i32 0, metadata !15} ; [ DW_TAG_subprogram ]
!12 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !13, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!13 = metadata !{null, metadata !14}
!14 = metadata !{metadata !"0xf\00\000\0064\0064\000\0064", i32 0, null, metadata !7} ; [ DW_TAG_pointer_type ]
!15 = metadata !{metadata !16}
!16 = metadata !{metadata !"0x24"}                      ; [ DW_TAG_base_type ]
!17 = metadata !{metadata !"0x34\00b\00b\00\0011\000\001", null, metadata !6, metadata !18, %class.B* @b, null} ; [ DW_TAG_variable ]
!18 = metadata !{metadata !"0x2\00B\005\0032\0032\000\000\000", metadata !28, null, null, metadata !19, null, null, null} ; [ DW_TAG_class_type ] [B] [line 5, size 32, align 32, offset 0] [def] [from ]
!19 = metadata !{metadata !20, metadata !21, metadata !27}
!20 = metadata !{metadata !"0xd\00b\007\0032\0032\000\001", metadata !28, metadata !18, metadata !10} ; [ DW_TAG_member ]
!21 = metadata !{metadata !"0x2e\00B\00B\00\005\000\000\000\006\00320\000\005", metadata !6, metadata !18, metadata !22, null, null, null, i32 0, metadata !25} ; [ DW_TAG_subprogram ]
!22 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !23, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!23 = metadata !{null, metadata !24}
!24 = metadata !{metadata !"0xf\00\000\0064\0064\000\0064", i32 0, null, metadata !18} ; [ DW_TAG_pointer_type ]
!25 = metadata !{metadata !26}
!26 = metadata !{metadata !"0x24"}                      ; [ DW_TAG_base_type ]
!27 = metadata !{metadata !"0x2a\00\000\000\000\000\000", metadata !18, null, metadata !7} ; [ DW_TAG_friend ]
!28 = metadata !{metadata !"foo.cpp", metadata !"/Users/echristo/tmp"}
!29 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}